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The wide open f/1.8 maximum aperture ensures optimal light performance throughout the entire zoom range so you can get sharp results in extreme light conditions
The combination of the telephoto zoom range, fast aperture, 9-blade rounded diaphragm and high quality glass elements makes this lens ideal for photographers who wish to separate their subject from the background.
The Sigma 50-100mm Art uses a combination of three FLD (F Low Dispersion) glass elements, one SLD (Special Low Dispersion) glass element, three high-refractive index SLD glass elements, and one high-refractive index, high-dispersion glass element to reduce axial and transverse chromatic aberration. By including one or more low-dispersion element in every element group, this lens ensures outstanding image quality throughout the zoom and focal range.
The Sigma 50-100mm f1.8 Art features a slimmer and enhanced version of Sigma's Hyper Sonic Motor (HSM) autofocus motor. The motor delivers near-silent, smooth, accurate and fast autofocus that can be manually adjusted without needing to use a mode switch.
Thanks to SIGMAs inner focus and inner zoom technologies, adjusting the focus and zoom rings does not change the length of the lens, and turning the zoom ring is not prone to cause focus shift.
From the start of the design process, SIGMA measured flare and ghosting to establish an optical design that is resistant to strong incidental light sources such as backlight. At the prototyping stage, SIGMA used not only simulations but actual photographic experiments to assess flare and ghosting under multiple criteria, identify the causes of these issues under a wide range of situations, and take measures to mitigate them. In addition, SIGMAs Super Multi-Layer Coating helps further reduce flare and ghosting and provide sharp, high-contrast images even in backlit conditions.
From the start of the design process, SIGMA measured flare and ghosting to establish an optical design that is resistant to strong incidental light sources such as backlight. At the prototyping stage, SIGMA used not only simulations but actual photographic experiments to assess flare and ghosting under multiple criteria, identify the causes of these issues under a wide range of situations, and take measures to mitigate them. In addition, SIGMAs Super Multi-Layer Coating helps further reduce flare and ghosting and provide sharp, high-contrast images even in backlit conditions.
The degree to which light is refracted by glass depends on the light's wavelength. This fact causes different colors of light to focus at slightly different points. The result is chromatic aberration, the color fringing that is particularly noticeable in telephoto lenses. Most chromatic aberration can be removed by combining a high-refractivity convex lens element with a low-refractivity concave element. Yet residual chromatic aberration known as secondary spectrum may still remain. To minimize this secondary spectrum, which can be a serious issue with conventional lenses, SIGMA lenses feature up to three types of exclusive low-dispersion glass offering superior performance: ELD (Extraordinary Low Dispersion), SLD (Special Low Dispersion) and FLD (F Low Dispersion). In particular, FLD glass offers ultra-low dispersion in combination with high transmittance and the anomalous dispersion characteristics of fluorite. Meticulous deployment of these types of exclusive low-dispersion glass and optimization of power distribution gives SIGMA lenses superlative image rendition undiminished by residual chromatic aberration.
Lens construction | 21 elements in 15 groups |
Minimum aperture | F16 |
Filter Size | φ82 |
Angle of view(DC) | 31.7-16.2 |
Minimum focusing distance | 95cm / 37.4in. |
Dimensions (diameter x length) | Φ93.5mm × 170.7mm / 3.7in. x 6.7in. |
Number of diaphragm blades | 9 (Rounded diaphragm) |
Maximum magnification ratio | 16.7 |
Weight | 1,490g / 52.6oz. |
All products excluding batteries sold by Orms are covered by a minimum of a one year local warranty, reckoned from the date of purchase, to protect you against manufacturing defects.
Canon IXUS, PowerShot compact cameras are covered by a full 1 Year Warranty
Canon DSLR and Mirrorless cameras are covered by a full 2 Year Warranty.
Canon video cameras including Legria and X-series are covered by a full 1 Year Warranty.
Nikon compacts excluding the Coolpix P900 are covered by a full 1 Year Warranty.
Nikon DSLR's including the CoolPix P900 and are covered by a full 2 Year Warranty.
Panasonic cameras and lenses are covered by a full 2 Year Warranty.
Fujifilm cameras are covered by a 2 Year Warranty.
Sigma and Tamron products are covered by a 3 Year Warranty, which only applies to when registering your Tamron/Sigma product.
Lexar and Sandisk memory cards are covered by a Limited Lifetime Warranty.
Lowepro's Limited Original Owner Warranty covers defects in materials and workmanship during the useful life of the product. The warranty does not cover damage caused by improper care.
All used gear sold by ORMS is supplied with a 6 Month Warranty.
All refurbished gear sold by ORMS is supplied with a 12 Month Warranty.
Please contact our service division straight away on 021 - 469 1962 and notify them of the fault. You may also e-mail them at repairs@orms.co.za
1. If a product is defective / faulty, ORMS will replace the product within a 10 day period deemed from the date of receiving the product. ORMS will also cover the shipping costs within the borders of South Africa.
2. During the warranty period, Orms will arrange collection of the faulty item, facilitate the repair and then ship the product back to the customer, bearing all risks and costs.
3. Please see our policies under Return Policy and Servicing & Repair Policy for further information
Orms is not obliged to repair products that fall outside of the manufacturers warranty period, or products that are damaged accidentally, however Orms in seeking to deliver the highest standard of customer service will gladly assist the customer in having the product repaired via the network of repair agents with which Orms has business dealings.
Free Economy Shipping is available on all orders exceeding R1 000. (T&C's apply)
*Terms and conditions to qualify for free shipping:
*Reckoned from time of dispatch to time of arrival to client. This is an estimate and not guaranteed.
We use DawnWing couriers as our preferred method of delivery.
With sophisticated track and trace equipment, you can pinpoint exactly where your parcel is, from the moment it is dispatched by us, until it's safely handed over to you the recipient.
Your parcel is well packaged and bubble wrapped before delivery. We also fully insure your parcels contents for the journey to your door.
We charge a flat-rate for shipping and the charges are per order.
*Reckoned from time of dispatch to time of arrival to client. This is an estimate and not guaranteed. This period does not include Saturdays, Sundays and public holidays. The base price of R80.00 incl. VAT is for a parcel up to 10kg in Volumetric and Physical weight. Should the item/s exceed this weight, we reserve the right to increase the shipping charge accordingly.
Please Note: The above prices quoted are for ordering online through the ORMSdirect website only. A different rate will be quoted if handled manually through our camera sales department. Our delivery service only runs from Monday to Friday. Saturday morning deliveries can be done by special arrangement only and at an additional charge. Please contact info@orms.co.za to arrange. We reserve the right to re-quote the delivery fee should this become too expensive.
Please note:
International orders are generally subject to local import duties and taxes (VAT)
Orms is not responsible for, nor can we offer, any specific advice regarding any customs related fees that you may incur. For specific information, please consult with your local government import office.
Privacy: Your privacy is important to us. We strive to exceed your expectations for privacy. Cross-border shipments are subject to inspection by customs authorities. We may also be called upon to provide certain order, shipment, and product information to our international carriers. Carriers may communicate such information to customs authorities for the purpose of facilitating customs clearance and compliance with local laws.
International shipments are quoted on a per order basis depending on the size and weight of the parcel shipped.
You are welcome to place your order online, pay for it and collect it from our Cape Town or Bellville branches. You will need to bring in a print out of the order for collection. Please ask for online sales on arrival.
Shop 5, Roeland Square
Upper Canterbury Street
Gardens, Cape Town, 8001
South Africa
> View on Google Maps: ORMS C.T
Ground Floor, Tygervalley Chambers 2
27 Willie van Schoor Avenue
Bellville, Cape Town, 7530
South Africa
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